The decision came amid “so much importuning, from so many people, all with the same sentiment: they all express their hope that we not give up and instead find some way to proceed with building Pier55,” Diller said in the statement.

“In these last weeks I began to think that we should not let it go, and that I would try to put aside the disappointments and difficulties of these last years."

In a statement Wednesday, however, Cuomo said City Club had agreed to end its legal battle against the project, adding that he planned to make sure the Hudson River Park is “completed” by the end of his tenure as governor.

The state’s 1998 plan for the park was supposed to be completed by 2003, but the park is still unfinished, Cuomo explained.

On Wednesday, City Club lawyer and founding member Richard Emery told DNAinfo New York the governor’s promise swayed the opposition.

“He made an offer that we really couldn’t refuse — he offered to do what nobody’s done in 20 years, which is finish the park and protect the Hudson River. That’s a trade-off that we think is worth making, notwithstanding our success in opposing [the project],” he explained.

“And so it was a pragmatic trade-off that we believe is great for the Hudson, great for New York City, and great for the fish and the estuary, literally,” Emery added.

Cuomo’s promise will ensure that work on unfinished parts of the park — like the crumbling Pier 40 — will move forward, he said, noting that certain parts of the park will now get the historic preservation they need.

The City Club's main objections to the project had included the “lack of public participation” and the “secret nature” of its planning, Emery said.

Of the environmental concerns the club had raised previously, Emery noted that Diller and the Trust “won that issue in court, that they had taken care of the environmental concerns.”

“We’re basically saying that we’re going to hold our nose and deal… with this project, for the betterment of the entire project as a whole,” he explained.

In a statement, Trust chair Diana Taylor said it was “a tragedy for the public that the project was cancelled last month.”

“We will work with all stakeholders to figure out a way forward and bring this incredible project to fruition,” she said.